tests: more uses of $(...) over `...` for command substitution

Somehow missed by the previous changes.  No big deal, fix them now.

* t/ax/depcomp.sh: Here.
* t/autodist.sh: And here.
* t/autodist-no-duplicate.sh: And here.
* t/autodist-subdir.sh: Ad here.
* t/remake11.sh t/self-check-me.tap: And here.
* t/perf/testsuite-summary.sh: And here.
* t/perf/testsuite-recheck.sh: And here.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

8 files changed, 25 insertions, 25 deletions

diff --git a/t/autodist-no-duplicate.sh b/t/autodist-no-duplicate.sh
index 2e610ae02..0055e4cd1 100755
--- a/t/autodist-no-duplicate.sh
+++ b/t/autodist-no-duplicate.sh
@@ -24,14 +24,14 @@ re='Files .*automatically distributed.*if found'
 # The automake manual states that the list of automatically-distributed
 # files should be given by 'automake --help'.
 
-list1=`$AUTOMAKE --help \
-        | sed -n "/^$re.*always/,/^ *$/p" \
-        | sed 1d`
+list1=$($AUTOMAKE --help \
+         | sed -n "/^$re.*always/,/^ *$/p" \
+         | sed 1d)
 list1=$(echo $list1)
 
-list2=`$AUTOMAKE --help \
-        | sed -n "/^$re.*under certain conditions/,/^ *$/p" \
-        | sed 1d`
+list2=$($AUTOMAKE --help \
+         | sed -n "/^$re.*under certain conditions/,/^ *$/p" \
+         | sed 1d)
 list2=$(echo $list2)
 
 test -n "$list1"
diff --git a/t/autodist-subdir.sh b/t/autodist-subdir.sh
index 19d22dc4f..1454edd7b 100755
--- a/t/autodist-subdir.sh
+++ b/t/autodist-subdir.sh
@@ -36,9 +36,9 @@ $AUTOCONF
 
 # The automake manual states that the list of automatically-distributed
 # files should be given by 'automake --help'.
-list=`$AUTOMAKE --help \
-        | sed -n '/^Files.*automatically distributed.*if found.*always/,/^ *$/p' \
-        | sed 1d`
+list=$($AUTOMAKE --help \
+         | sed -n '/^Files.*automatically distributed.*if found.*always/,/^ *$/p' \
+         | sed 1d)
 # Normalize whitespace, just in case.
 list=$(echo $list)
 
diff --git a/t/autodist.sh b/t/autodist.sh
index f8f68ad24..952df4abd 100755
--- a/t/autodist.sh
+++ b/t/autodist.sh
@@ -35,9 +35,9 @@ $AUTOCONF
 
 # The automake manual states that the list of automatically-distributed
 # files should be given by 'automake --help'.
-list=`$AUTOMAKE --help \
-        | sed -n '/^Files.*automatically distributed.*if found.*always/,/^ *$/p' \
-        | sed 1d`
+list=$($AUTOMAKE --help \
+         | sed -n '/^Files.*automatically distributed.*if found.*always/,/^ *$/p' \
+         | sed 1d)
 # Normalize whitespace, just in case.
 list=$(echo $list)
 
diff --git a/t/ax/depcomp.sh b/t/ax/depcomp.sh
index 7a602291a..f8e372f16 100644
--- a/t/ax/depcomp.sh
+++ b/t/ax/depcomp.sh
@@ -134,11 +134,11 @@ AM_INIT_AUTOMAKE
 AC_PROG_CC
 AM_PROG_CC_C_O
 AM_PROG_AR
-`if test $depcomp_with_libtool = yes; then
-  echo AC_PROG_LIBTOOL
-else
-  echo AC_PROG_RANLIB
-fi`
+$(if test $depcomp_with_libtool = yes; then
+    echo AC_PROG_LIBTOOL
+  else
+    echo AC_PROG_RANLIB
+  fi)
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_OUTPUT
 END
diff --git a/t/perf/testsuite-recheck.sh b/t/perf/testsuite-recheck.sh
index 50cc03ba2..6fd793b02 100755
--- a/t/perf/testsuite-recheck.sh
+++ b/t/perf/testsuite-recheck.sh
@@ -69,7 +69,7 @@ END
 # Temporarily disable shell traces, to avoid bloating the log file.
 set +x
 
-for i in `seq_ 1 $count`; do
+for i in $(seq_ 1 $count); do
   echo dummy $i > $i.log
   echo :global-test-result: PASS > $i.trs
   echo :test-result: PASS >> $i.trs
diff --git a/t/perf/testsuite-summary.sh b/t/perf/testsuite-summary.sh
index a11bb8ef7..cefef170c 100755
--- a/t/perf/testsuite-summary.sh
+++ b/t/perf/testsuite-summary.sh
@@ -38,7 +38,7 @@ END
 # Temporarily disable shell traces, to avoid bloating the log file.
 set +x
 
-for i in `seq_ 1 $count`; do
+for i in $(seq_ 1 $count); do
   echo false > $i.t
   echo dummy $i > $i.log
   echo :global-test-result: PASS > $i.trs
diff --git a/t/remake11.sh b/t/remake11.sh
index 93ef22449..3b97df9c9 100755
--- a/t/remake11.sh
+++ b/t/remake11.sh
@@ -48,10 +48,10 @@ bottom=$(pwd) || fatal_ "getting current working directory"
 
 cd "$ocwd"
 
-makefiles_am_list=`find . -name Makefile.am | LC_ALL=C sort`
-makefiles_list=`echo "$makefiles_am_list" | sed 's/\.am$//'`
-bar_in_list=`find . -name bar.in | LC_ALL=C sort`
-bar_list=`echo "$bar_in_list" | sed 's/\.in$//'`
+makefiles_am_list=$(find . -name Makefile.am | LC_ALL=C sort)
+makefiles_list=$(echo "$makefiles_am_list" | sed 's/\.am$//')
+bar_in_list=$(find . -name bar.in | LC_ALL=C sort)
+bar_list=$(echo "$bar_in_list" | sed 's/\.in$//')
 
 cat configure.ac # For debugging.
 
diff --git a/t/self-check-me.tap b/t/self-check-me.tap
index 2b720fafa..0ac8e20c7 100755
--- a/t/self-check-me.tap
+++ b/t/self-check-me.tap
@@ -59,8 +59,8 @@ result_ "$r" "override of \$me before ./defs is honored"
 unset r
 
 # Overriding $me after sourcing ./defs-static should work.
-s=`$AM_TEST_RUNNER_SHELL -c '. ./defs-static && me=zardoz &&
-                             . ./defs && echo me=$me' bad.sh`
+s=$($AM_TEST_RUNNER_SHELL -c '. ./defs-static && me=zardoz &&
+                              . ./defs && echo me=$me' bad.sh)
 command_ok_ "override of \$me after ./defs-static causes no error" \
             test $? -eq 0